This segment appeared in the very first episode of The Dex, and aims to point out scientific errors of a Pokemon, such as in-game contradictions, over-exaggerated Pokedex entries, and design flaws. During the segment, Alex and Kellz usually wear "scientific" glasses, and end every factoid with some iteration of the phrase, "That's bad science!"

This segment features Kellz teaching a lesson about a particular aspect of a Pokemon. Kellz wears glasses and a necktie to appear more "teacher-y", and ends the segment with "Class Dismissed!" The segment is sometimes given a subtitle (shown in parentheses after each episode in the list)

In this segment, Alex and Kellz explore a wide range of dragon mythology and how it relates to a Dragon-Type (or dragon-like) Pokemon. The segment ends with an enthusiastic "Dragons are cool!" from Kellz. The title card image changes to a different dragon each episode.

As a counter to Bad Pokemon Science, this segment explains how a Pokemon's design is corroborated by scientific facts. Alex and Kellz usually wear "scientific" glasses, and end every factoid with some iteration of the phrase, "That's just good science!"

This segment involves Alex and Kellz disproving different fan-made theories or common misconceptions about a Pokemon. They end each theory-disproving fact with "Busted!" Originally, Kellz wanted this segment to be called "Mythbusters" or "Ball-Busters", but both names were immediately rejected by Alex.

In this segment, Alex and Kellz take a behind-the-scenes look at the creation and design of a Pokemon, and how it ties into developmental aspects of the Pokemon game. Alex objected to the title of this segment at first, but in Episode 69 he admits that he "officially loves it".

In this segment, Alex and Kellz highlight silly conspiracies that surround a Pokemon's creation, or draw from real-life conspiracy theories to explain a Pokemon's design. During the segment they sometimes use weird voices as a way of mocking conspiracy theorists.

This segment consists of Alex and Kellz analyzing a Pokemon's design and explaining its connections to many different cultural backgrounds. The segment is sometimes given a subtitle (shown in parentheses after each episode in the list).

A play on Pokemon Etymology, this segment deals with how Bug-Type (or bug-like) Pokemon relate to their real-life bug counterparts. There can possibly be a little etymology thrown in as well. The segment is given a subtitle in each episode (shown in parentheses after each episode in the list).

This segment is exactly what it sounds like; Alex and Kellz look at the name of a Pokemon and explore its roots, hidden meanings, and pronunciation. The segment is given a subtitle in each episode (shown in parentheses after each episode in the list).

In this segment, Alex and Kellz discuss the background and significance of certain apparel that a Pokemon appears to wear. It is often prefaced with Alex's segment-specific catchphrase: "Also...go wear clothes."

This segment only appears in episodes about legendary Pokemon. It involves theories about the past, present, and future of the Pokemon world and how the influences of a certain legendary Pokemon tie into the big picture. A running gag in the series is for one person to be uneasy with doing the segment until the other mentions the word "etcetera".

This segment can only be found in the Politoed Episode and features Alex and Kellz studying Politoed's design to figure out whether Politoed a frog or a toad. Their conclusion is that Politoed is both because a toad is just a specific sub-category of frogs.

In this special extra segment from the Meowth Episode, Alex and Kellz discuss possible explanations as to why the Meowth in the Pokemon anime is capable of human speech. The title and title card of this segment are a reference to the 2013 movie, A Talking Cat!?

This segment found in the Professor Oak Episode features Alex and Kellz presenting an in-depth description of what the PokeDex is and how it works. The segment's title card features a special animation of a spiraling PokeDex displayed within more spiraling PokeDexes.

In this segment found in the Avalugg Episode, Alex and Kellz point out the similarities between Avalugg and a historical event known as Project Habakkuk, explaining how it could've inspired elements of Avalugg's design.

Found in the Cacturne Episode, this segment features Alex and Kellz exploring the meaning behind the second half of Cacturne's name. They explain that it is derived from "nocturne", and discuss how it relates to the design of Cacturne.

Found in the Noivern Episode, this segment explains how different aspect of sound -- such as echolocation and resonant frequency --connect to Noivern's design.At the beginning of the episode, Alex shows disappointment at the fact that this segment was featured instead of Dragons are Cool. He also references another segment, Pokemon that Wear Clothes, quoting the segment's signature catchphrase. This is a bit out of place since Noivern is not a Pokemon that wears clothes.

This segment was used as a "bonus segment" to replace the "Random Thoughts" part of Battle Strategy in the Shuckle Episode. It describes the hypothetical circumstances that could take place to allow Shuckle to do the most damage in a single attack possible. The scenario is highly unlikely, but possible, hence the name.

This segment is exclusive to the Dunsparce Episode and features Alex sticking up for the much-unappreciated Dunspacre with an emotional speech. Halfway through his speech a waving American flag fades into the background.

In this segment from the Greninja Episode, Alex and Kellz explore the Japanese ninja soldiers and the inspiration for Greninja's design. Kellz originally wanted to call this segment "Ninja Warrior", but Alex turned down the idea because that show already exists.

In this special Pikachu Episode segment, Kellz demonstrates how Pikachu's cries form a fairly consistent language in the Pokemon anime, translating common words into Pikachu-speak. Alex is blown away by this revelation.

In this special segment found in the Cofagrigus Episode, Alex and Kellz hand over the floor to their crack team of ghost hunters exploring a haunted mansion. The team communicates through video chat and discusses several mummy curses that inspired Cofagrigus's design. At the end, the whole team is wiped out by a Cofagrigus.

This segment is a spin-off of What the Hellhound?. In this segment found in the Roserade Episode, Alex and Kellz discuss how Roserade's design relates to the Hellebore plant. The title card for this segment, like its hellish counterpart, features the title spoken in a funny voice and a title-text animation.

This segment is exclusive to the Houndoom Episode, where Alex and Kellz list many hell-ish dogs of lore that could have contributed to the design of Houndoom. The title card for this segment is rather unique, featuring the title spoken in a funny voice and a title-text animation.

This segment is a spin-off of What the Hellhound?. In this segment found in the Jellicent Episode, Alex and Kellz explore Jellicent's name origins and discuss how its design relates to jellyfish. The title card for this segment, like its hellish counterpart, features the title spoken in a funny voice and a title-text animation.